Marshall Studio JTM Guitar Amplifier Head (20 Watts)

Discover the sound of Marshall's original design with the Studio JTM. Twenty- and five-watt power modes let you dial in the perfect sound in any situation.

The amp that started it all is back. The same iconic JTM sound, but more compact packing the power you know and love from Marshall, in a new portable size.

The JTM is a welcome addition to the Studio range, offering players authentic, smooth, and valve-driven break-up at lower volumes perfect for home or studio use. Don't let its size fool you, the superb all-valve tone of the Studio JTM packs a punch. Creating a sound that defined a generation.

The JTM delivers the legendary loud blend of crunch and clean recognized the world over. Like the original 30W head, the Studio JTM is loaded with two ECC83 preamp valves, two 5881 power amp valves (tubes) and one ECC83 phase splitter, taking you right back to the renaissance of rock'n'roll.

The Studio JTM offers the same control and versatility as older models, where simply patching the two channels together opens up a world of all-valve tonal possibility. Power switching enables you to switch effortlessly between 20W and 5W and two loudness controls mean you can play as loud as you like. Features such as a DI out and FX loop have been added, bringing the JTM into the now.

Hand built at Marshall's world-class factory in Bletchley, England, the Studio JTM features fingerjointed cabinets, hand-welded chassis, hand-soldered potentiometers and valve bases, and the highest quality componentry. Adorned with period-correct aesthetics from the same metal, red enamel poured "coffin" logo to its fawn fret complete with gold piping and beading, read more the Studio JTM beautifully nods to the 60s.


- The iconic JTM sound in a more compact package
- Authentic, smooth, and "valve-driven" break up, even at lower volumes
- Two ECC83 preamp and two 5881 power amp valves/tubes
- One ECC83 phase splitter valve/tube
- Same control and versatility as older models
- Power switching between 20W and 5W
- DI out and an FX Loop
- Hand built in Bletchley, England
- Period-correct aesthetics beautifully nods to the 60s
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-Power: 20W with power reduction to 5W
-Valves/Tubes: 2 x ECC83, 1 x ECC83 (phase splitter) and 2 x 5881
-Channels: Single channel with four separate inputs High treble and normal loudness controls
-Equalization: Treble, middle, bass and presence
-Speaker outputs: 5 x 1/4" jack sockets (16 Ohm load / 8 Ohm load / 4 Ohm load)
-Outputs: DI output
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 26.05 lbs
Shipping Dimensions: 29 x 17 x 12 in
Manufacturer Part Number (MPN): M-ST20H-U
Blemished, USED
Shipping Weight: 26.05 lbs
Shipping Dimensions: 29 x 17 x 12 in
Manufacturer Part Number (MPN): M-ST20H-U

For support or warranty questions, please contact the manufacturer:
Phone: 800-877-6863


  • 18 x  
  • 12 x  
    $145.83 with zZounds
  • 8 x  
    $218.75 with zZounds
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